Striking surface of a golf club head



FIG. 1 is a front elevational view of the striking surface for a golf club head; and,

FIG. 2 is a front elevational view thereof, showing a representation of the visual effect when light strikes the surface of FIG. 1.

All broken lines in the drawing disclosure are not part of the claimed design. 

The ornamental design for a striking surface of a golf club head, as shown and described. 